Kill the Stag Lord, then speak with Nettle

So, the one sending us those nightmares was Davik Nettle — formerly a ferryman, now a creepy corpse eager to get revenge upon the Stag Lord. But that's why we came in the first place — to end the bandit's atrocities! So there was no need to spook us with bad dreams! Well, at least now we won't just be pacifying the region — we're also helping a poor soul find rest.